Penny's POV.

The sudden impact on my face left me gasping, my mind reeling. It took a moment to register that someone had slapped me. When I jerked my head up, my eyes widened in shock – it was my sister.

"What did I do?" I asked, confusion etched on my face.

Her response was immediate and furious. "You bitch, how dare you!" she spat, her hand flying towards me again.

I flinched, but this time I was prepared. I caught her wrist, my grip firm.

"What's wrong with you?" I demanded, my eyes locked on hers. "What did I do to you?"

"What's wrong, Penny? Did you just ask...